EP 0254586 A2 19880127 - Means to reduce harmonic torque in electromagnetic machines.
Title (en)
Means to reduce harmonic torque in electromagnetic machines.
Title (de)
Mittel zum Vermindern harmonischer Drehmomente in elektrischen Maschinen.
Title (fr)
Moyens pour réduire des couples harmoniques dans des machines électriques.
Publication
Application
Priority
US 88952986 A 19860725
Abstract (en)
An electromagnetic machine of the type having a moving member and a stationary member, with a set of structures on the moving member to magnetically interact with a set of structures on the stationary member, has an improved construction comprising displacing by an angle of displacement, alpha m, from their normal positions, a first portion on one set of structures whereby the displacement causes a harmonic of the fundamental torque/angle curve to be attenduated. The angle of displacement is determined by the following relationship: alpha m = @@, where alpha e = displacement in electrical degrees, p= number of moving member magnetic pole pairs, further where alpha e = @@@, where h = an integer equal to the number of a harmonic of the fundamental torque/angle curve to be attenuated.
IPC 1-7
IPC 8 full level
H02K 1/27 (2006.01); H02K 37/04 (2006.01); H02K 37/14 (2006.01); H02K 37/18 (2006.01)
CPC (source: EP US)
H02K 1/2713 (2013.01 - EP US); H02K 37/18 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0254586 A2 19880127; EP 0254586 A3 19881019; EP 0254586 B1 19901107; DE 3766030 D1 19901213; JP 2549863 B2 19961030; JP S6335162 A 19880215; US 4739201 A 19880419
DOCDB simple family (application)
EP 87306560 A 19870724; DE 3766030 T 19870724; JP 14813787 A 19870616; US 88952986 A 19860725